This guideline ensures that unintended backtracking behavior
does not occur in a flow chart. If unintended backtracking occurs
during simulation, a warning message appears.
You can control the level of diagnostic action for unintended
backtracking in the Diagnostics > Stateflow pane of the Model
Configuration Parameters dialog box. For more information, see the
documentation for the Unexpected backtracking (Simulink) diagnostic.
Unintended backtracking can occur at a junction under these
The junction does not have an unconditional transition
path to a state or terminating junction.